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A Portable Colorimetric Sensing Platform for the Evaluation of Carbon Dioxide in Breath

Abstract This work describes the development of a device for measuring CO2 in breath, which has applications in monitoring a variety of health issues, such as Chronic Obstructive Pulmonary Disease (COPD), asthma, and cardiovascular disease. The device takes advantage of colorimetric sensing technology in order to maintain a low cost and high user-friendliness. The sensor consists of a pH dye, reactive element, and base coated on a highly porous Teflon membrane. The transmittance of the sensor is measured in the device via a simple LED/photodiode system, along with the flow rate, ambient relative humidity, and barometric pressure. The flow is measured by a newly developed flow meter described in this work, the Confined Pitot Tube (CPT) flow meter, wh... (more)
Created Date 2017
Contributor Bridgeman, Devon (Author) / Forzani, Erica S (Advisor) / Nikkhah, Mehdi (Committee member) / Holloway, Julianne (Committee member) / Raupp, Gregory (Committee member) / Emady, Heather (Committee member) / Arizona State University (Publisher)
Subject Chemical engineering / Biomedical engineering / Chemistry / Breath / Capnography / CO2 / Colorimetric / Flow / Sensor
Type Doctoral Dissertation
Extent 153 pages
Language English
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Chemical Engineering 2017
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS

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Description Dissertation/Thesis